books.google.at - The newest addition to the highly regarded Helm Identification Series, which includes Seabirds (“unparalleled achievement,” “best bird guide of any kind or of any generation,” “sets the standard of excellence”) and Shorebirds (“a superb guide,” “a landmark volume”). One of the most...http://books.google.at/books/about/Raptors_of_the_World.html?hl=de&id=hlIztc05HTQC&utm_source=gb-gplus-shareRaptors of the World